Null Modem cables MAY be used for cable polling. Polling cables in special lengths, or to meet other special requirements, may be ordered from Computer Cable Makers in Sacramento, CA: 916-921-2243. The pinout is as follows: 2-3 TX-RX 2-3 RX-TX 7-7 SG 5, 6 AND 8 STRAP TO 20-DTR 20 STRAP TO: 5-CTS, 6-DSR AND 8-CD GROUND SHIELD TO HOOD. These pinouts are for a cable with 25-pin connectors on both ends. Computer Cable Makers can make a 9-pin version, if necessary, using the pinouts above. This cable is identical to a Monarch cable.